CN1929384A - Mobile ad hoc network system - Google Patents

Mobile ad hoc network system Download PDF

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Publication number
CN1929384A
CN1929384A CNA200610105985XA CN200610105985A CN1929384A CN 1929384 A CN1929384 A CN 1929384A CN A200610105985X A CNA200610105985X A CN A200610105985XA CN 200610105985 A CN200610105985 A CN 200610105985A CN 1929384 A CN1929384 A CN 1929384A
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China
Prior art keywords
communication
terminal
zone
information
hello message
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Pending
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CNA200610105985XA
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Chinese (zh)
Inventor
正村雄介
山本淳二
吉泽聪
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Hitachi Ltd
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Hitachi Ltd
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Publication of CN1929384A publication Critical patent/CN1929384A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/38—Modification of an existing route adapting due to varying relative distances between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/18—Communication route or path selection, e.g. power-based or shortest path routing based on predicted events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/30—Connectivity information management, e.g. connectivity discovery or connectivity update for proactive routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

The invention provides a method for preventing communication disconnection to be caused when performing switching from direct communication to two hop communication in communication between a fixed terminal and a mobile terminal by an OLSR. In ad hoc systems using OLSR, when a mobile node moves out of the fixed node's communication area, communication is impossible in the period from leaving the communication area until the time-out, even if there is a node to relay communications between the fixed node and mobile node. Switching from direct communication to 2-hop communication without interruption is therefore important for achieving continuous communication. Each node reports its position information and speed information to a neighbor mode. The fixed node compares that information with its own communication area, detects mobile node movement to outside the communication area from the mobile node's position and speed information, and switches beforehand to 2-hop communication via a relay node.

Description

Mobile ad hoc network system
Technical field
The present invention relates to a kind of ad hoc network system, specially refer to the optimal communication routing resource of fixed terminal and portable terminal in the communication system of having utilized OLSR.
Background technology
For the Optimized Link State Routing Protocol (OLSR) by IETF research, shown in non-patent literature 1, but each terminal is exchanged periodically the Hello message that comprises the direct communication terminal list at terminal room.Utilize this Hello message, obtain the information of peripheral terminal, make up self-organizing network.
Non-patent literature 1 RFC3626, Optimized Link State Routing Protocol (OLSR), October, 2003
In OLSR, each terminal is fabricated into the communication path of peripheral terminal according to the information of Hello message.In addition, at certain hour (time-out time) but can not receive from the time as the Hello message of the terminal of direct communication, judge and can not carry out direct communication, and the change communication path with this terminal.Therefore, its state is, in fixed terminal and communications of Mobile Terminals process, when portable terminal carries out outside the communication zone of fixed terminal when mobile, from having gone out communication zone during overtime, even have the terminal of fixed terminal and communications of Mobile Terminals being carried out relaying, can not communicate.
Summary of the invention
The objective of the invention is to, provide a kind of and in the fixed terminal that utilizes OLSR and communications of Mobile Terminals process, avoid from direct communication to the communicate by letter method of the communication disruption that takes place when switching of double jump.
In order to achieve the above object, each terminal obtains positional information and velocity information, and terminal is announced to the periphery.The communication zone of fixed terminal and self compares, and detects situation mobile to communication zone outside in advance according to the position and speed information of portable terminal, switches to the double jump communication via link terminal.
According to the present invention, outside when mobile when portable terminal in the communication process of portable terminal and fixed terminal from the communication zone of fixed terminal, just can switch to double jump communication without interrupt communication from direct communication.
Description of drawings
Fig. 1 is to use network concept figure of the present invention.
Fig. 2 is the block diagram of the inside of base station structure used among the present invention of expression.
Fig. 3 is the block diagram of the terminal inner structure used among the present invention of expression.
Fig. 4 is the concept map of explanation adjacent terminals list structure.
Fig. 5 is the flow chart of explanation OLSR Message Processing.
Fig. 6 is that the explanation communication path is made the flow chart of handling.
Fig. 7 is the precedence diagram of the state behind explanation enforcement the present invention.
Fig. 8 is the format chart of the Hello message after the velocity information of additional position.
Fig. 9 is the concept map of explanation Hello message sink historical record structure.
The flow chart of the processing when Figure 10 is the making of explanation Hello message sink historical record.
The flow chart of the processing when Figure 11 is explanation electric wave cartography.
Figure 12 is the concept map that explanation is divided into the electric wave figure behind the radial grid.
Embodiment
Below, to embodiments of the present invention, describe with reference to accompanying drawing.
Embodiment 1
Fig. 1 is the structure example of the ad hoc communication system of expression the present invention installation.System shown in Figure 1 is made of base station 101 and movable termination 102,103.Base station 101 and terminal 102,103 utilize OLSR to connect mutually.Fig. 1 is the example that base station 101 and terminal 102 are carried out two-way communication.But terminal 102 is carried out direct communication 111 in the communication zone 105 of base station 101 time, but if terminal 102 moves outside communication zone 105, then switches to the double jump communication 112 via terminal 103.
Fig. 2 (a) is the structure example of base station 101.CPU (Central Processing Unit) 201 actual various application programs and the OS (Operating System) of carrying out.In memory 202, storing program and the various application program used in the execution of CPU.CPU201 is connected by bus 203 with memory 202.Interface portion 204,205,206 run-down liness 207,208,209, carry out and other equipment between communication.Interface portion 204,205,206 will be exported to external equipment from the data that CPU201 or memory 202 are supplied, and perhaps will supply to CPU201, memory 202 from the data that external equipment is supplied.GPS (GlobalPositioning System) the 210th, the information that a kind of utilization sends from gps satellite is calculated the system of the latitude longitude of recipient's current location.GPS will export circuit 209 by the positional information of calculating the current location of being obtained.Base station 101 is carried out the position input so can utilize by manual the grade, and is saved GPS210 because be fixed terminal.
The functional block of Fig. 2 (b) expression base station 101.Memory 202 also has the self-organizing Route Selection to handle 211 except basic OS handles 212.Basic OS handles 212 and has the packets of information transmitting-receiving processing 230 of carrying out the transmitting-receiving of IP packets of information.
The self-organizing Route Selection is handled 211 and is had: OLSR Message Processing 227, carry out the processing of OLSR message such as Hello message; Communication path is made and is handled 226, makes communication path according to the information that is obtained by OLSR message; The communication zone information management handles 225, grasps the zone that can communicate by letter in base station 101.
OLSR message such as 227 pairs of Hello message of OLSR Message Processing, TC message, MID message and HNA message are handled.
With the result in the OLSR Message Processing 227, in adjacent terminals tabulation 224 and topology information 223, manage.The peripheral terminal information that will be obtained by Hello message manages in adjacent terminals tabulation 224, and will manage topology information 223 from the information that TC message etc. obtains.
But electric wave Figure 22 2 shows the zone that can arrive electric wave and the direct communication of this terminal, and Hello message sink historical record 221 keeps from the information of the received Hello message of portable terminal etc.
Fig. 3 (a) is the structure example of terminal 102,103.Except the structure of base station 101, also has vehicle speed sensor 316.In addition, also can replace GPS314, and from automobile navigation apparatus 315 information such as input position such as grade.The functional block of Fig. 3 (b) expression terminal 102,103.Identical with the base station, have basic OS processing 322 and self-organizing Route Selection and handle 321.Because its prerequisite is for moving, so become the structure of having saved communication zone information management processing 225, Hello message sink historical record 221 and electric wave Figure 22 2.
One example of Fig. 4 (a) expression adjacent terminals tabulation.Comprise: adjacent terminals address 401, the address of the terminal that the expression electric wave directly arrives; Connection status 402, the annexation between expression and self terminal; Valid period 403, the expression connection status is the effective time; Willingness404 is that terminal is announced by Hello message; Select priority 405, the priority when the expression path makes; Double jump terminal list 406, the end message that the expression adjacent terminals connects.One example of Fig. 4 (b) expression double jump terminal list 406.Double jump terminal list 406 comprises adjacent terminals double jump terminal address 410 that connects and the connection status 411 of representing adjacent terminals and double jump terminal connection status.In addition, the details of annexation 402 and Willingness404 is described identical with non-patent literature 1.
Handling process when Fig. 5 represents that OLSR Message Processing 229 receives Hello message.If receive Hello message (step 501), then retrieve the transmission address (step 502) that in the adjacent terminals address of adjacent terminals tabulation, whether comprises Hello message, when not comprising, interpolation makes and sends the address is the project (step 503) of adjacent terminals address.Then, confirm in Hello message, whether to comprise position and speed information (step 504), identical when not comprising with common OLSR terminal, upgrade adjacent terminals tabulation (step 509).If comprise position and speed information, then according to the electric wave figure of the position and speed information that obtains from Hello message and self terminal, the regional residence time (step 505) of computing terminal.In zone residence time during greater than threshold value, set effective time (step 508) of adjacent terminals tabulation according to the zone residence time, upgrade adjacent terminals tabulation (step 509).In regional residence time of terminal during less than threshold value, the selection priority 405 of adjacent terminals tabulation 224 is made as " low " (step 507), set effective time (step 508) of adjacent terminals tabulation the residence time according to the zone, upgrade adjacent terminals tabulation (step 509).
Communication path is made and handled 226 is to carry out the opportunity of changing to of adjacent terminals tabulation 224 and topology information 223.
Fig. 6 represents to make the handling processes that processing 226 is made communication path by the adjacent terminals tabulation by communication path.At first, making connection status according to adjacent terminals tabulation is adjacent terminals tabulation 1 (step 601) after the important document of SYM or MPR extracts, and makes according to adjacent terminals tabulation 1 and will select priority to be the adjacent terminals of the important document of " low " after removing 2 (steps 602) of tabulating.The adjacent terminals of adjacent terminals tabulation 2 is made an addition in the communication path table (step 603) as direct communication, utilize the address in the double jump terminal list of adjacent terminals tabulation 2, with the terminal of not logining in the communication path table, login in the communication path table (step 604).At this moment, login comprises the adjacent terminals address of this address in the double jump terminal list, is used as next hop address.Then, make adjacent terminals tabulation 3 (steps 605) that constitute by the important document of selecting priority " low " from adjacent terminals tabulation 1.Utilize the adjacent terminals address of adjacent terminals tabulation 3,, login in the communication path table (step 606) as direct communication with the terminal of not logining in the communication path table.Utilize the address in the double jump terminal list of adjacent terminals tabulation 3,, login in the communication path table (step 607) the terminal of login not in the communication path table.At this moment, login the next hop address of the communication path that leads to the adjacent terminals that comprises appropriate address in the double jump terminal list in the next hop address table.When the communication path to adjacent terminals was direct communication, next hop address was the adjacent terminals address.
Fig. 7 represents terminal 102 communication sequence when mobile outside the communication zone of base station 101.The exchange of Hello message is carried out in terminal 102 and base station, carries out direct communication.In base station 101, calculate residence time according to the position and speed information of terminal 102, if littler than threshold value, then to switching via the communication of terminal 103.In addition, the instruction that communication path switches is also sent to terminal 102 simultaneously in base station 101.Communication from from the base station to terminal 102 can be when judging residence time less than threshold value, at once to switching via the communication of terminal 103.In addition, from terminal 102 to the communication of base station 101 when receiving from the notice of base station or detecting communication from base station 101 via terminal 103, switch.101 can be by from the address of the adjacent terminals tabulation deletion terminal 102 of Hello message and send notice from the base station to the communication path switching command of terminal 102.
Fig. 8 represents to comprise position and speed information in interior Hello message one example.Set up and be illustrated in the L position that comprises position and speed information in the mark.
Below, handle 225 for the communication zone information management of base station 101 and describe.The communication zone information management is handled 225 and is used for making electric wave Figure 22 2.In order to make electric wave Figure 22 2, keep the Hello packets of information to receive historical record 221.
Fig. 9 represents an example of Hello message sink historical record 221.Hello message sink historical record 221 comprises reception could 901, constantly 902 and send position 903.
Figure 10 represents the making handling process of Hello message sink historical record.If receive Hello message (step 1001), then confirm in Hello message, to include position and speed information (step 1002).When not comprising position and speed information, end process.When comprising position and speed information, with the position that added with record the time of reception in the Hello message sink historical record 221 (step 1003), predict that according to velocity information this terminal sends the position of Hello message next time, and kept (step 1004).If during certain, receive next Hello message (step 1005), then handle once more from step 1001 beginning from this terminal.If in during certain receiving next Hello message (step 1005) from this terminal, then with the predicted position that kept and current time as can not receiving record in the Hello message sink historical record 221 (step 1006).
Figure 11 represents the making handling process of electric wave Figure 22 2.To be that the figure at center is divided into several regions (step 1101) with base station 101, the item number of the Hello message sink historical record 221 that comprises in each zone will be counted, ask for the ratio (step 1102) that to communicate by letter in each zone.But the ratio that can not communicate by letter is made as communication zone (step 1103) less than the zone of threshold value.Electric wave figure is manufactured with two kinds of methods, and the one, the method for the processing of after the base station is provided with, only producing once, the 2nd, regularly carry out method for updating.
Figure 12 represents the example of electric wave Figure 22 2.As the region segmentation method of electric wave Figure 22 2, be divided into radial grid.If found 1 can not communication zone, then from this zone along radial grid away from the zone be can not communication zone.
Utilizability on the industry
The present invention can be used in to portable terminal and provide in the service construction of communication environment. Especially Be, such as travel frequency and the more systems of terminal number such as communications network service towards automobile In, be effective.
Symbol description
101 ... the base station, 102 ... terminal 1,103 ... terminal 2,105 ... the base station is logical The letter zone, 111 ... direct communication between base station and the terminal 1,112 ..., 113 ..., 201 ... CPU, 202 ... memory, 203 ... bus, 204 ... interface, 205 ... connect Mouthful, 206 ... interface, 207 ... circuit, 208 ... circuit, 209 ... circuit, 210 ... GPS, 211 ... the self-organizing Route Selection is processed, and 212 ... basic OS processes 221 ... Hello The message sink historical record, 222 ... electric wave figure, 223 ... topology information, 224 ... adjacent Nearly terminal tabulation, 225 ... the communication zone information management is processed, and 226 ... communication path is made Process 227 ... the OLSR Message Processing, 228 ... the packets of information transmitting-receiving processes 301 ... CPU, 302 ... memory, 303 ... bus, 304 ... interface, 305 ... interface, 306 ... connect Mouthful, 307 ... interface, 308 ... interface, 309 ... circuit, 310 ... circuit, 311 ... line The road, 312 ... circuit, 313 ... circuit, 314 ... GPS, 315 ... the auto navigation dress Put 316 ... vehicle speed sensor, 321 ... the self-organizing Route Selection is processed, and 322 ... base This OS processes, and 331 ... topology information, 332 ... the adjacent terminals tabulation, 333 ... logical The letter path makes processes 334 ... the OLSR Message Processing, 335 ... the packets of information transmitting-receiving is processed, 401 ... the adjacent terminals address, 402 ... connection status, 403 ... valid period, 404 ... Willingness, 405 ... select priority, 406 ... the tabulation of double jump terminal, 410 ... the double jump terminal address, 441 ... connection status, 801 ... adjacent terminals information, 802 ... position and speed information, 901 ... reception could, 902 ... constantly, 903 ... send out Send the position.

Claims (5)

1. an ad hoc network system carries out two-way communication by the radio communication of self-organizing formula, it is characterized by:
Communication terminal has the communication zone management of information mechanism of self, extra-regional mobile according to detecting to this terminal communication from the regular position and speed information that sends of other communication terminals, change to communication in advance via the 3rd terminal in the communication zone that is present in this terminal.
2. ad hoc network system according to claim 1 is characterized by:
Move outside the communication zone of self if detect the communication counterpart terminal, then utilize Hello message, the switching in communication counterpart terminal notifying communication path.
3. ad hoc network system according to claim 1 is characterized by:
Above-mentioned communication zone information management architecture is collected the positional information that sends from terminal, but makes to have accumulated the figure of the zone of some as communication zone in certain time.
4. ad hoc network system according to claim 3 is characterized by:
After certain terminal reception comprises the Hello message of position and speed information, in the given time not when same terminal receives Hello message, predict mobile destination according to the position and speed information of recording and narrating in the original Hello message, to predict the place as communication unsettled zone, login on figure.
5. ad hoc network system according to claim 4 is characterized by:
Be made as radial grid chart by figure, from finding 1 communication during unstable region, will be made as the communication unstable region away from the zone in this zone, come construction drawing along radial grid with communication zone.
CNA200610105985XA 2005-09-06 2006-07-21 Mobile ad hoc network system Pending CN1929384A (en)

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JP2005257243A JP2007074177A (en) 2005-09-06 2005-09-06 Mobile ad hoc network system

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CN101291530B (en) * 2007-04-18 2012-07-11 株式会社日立制作所 Handoff method between different systems and wireless terminal
CN101286780B (en) * 2007-04-12 2012-10-03 华为技术有限公司 System and method for implementing relay transmission
CN102769938A (en) * 2011-05-05 2012-11-07 英特尔移动通信有限公司 Mobile radio communication devices, mobile radio communication network devices, methods for controlling a mobile radio communication device, and methods for controlling a mobile radio communication network device
US8644206B2 (en) 2007-08-17 2014-02-04 Qualcomm Incorporated Ad hoc service provider configuration for broadcasting service information
US9179367B2 (en) 2009-05-26 2015-11-03 Qualcomm Incorporated Maximizing service provider utility in a heterogeneous wireless ad-hoc network
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CN106658635A (en) * 2016-11-03 2017-05-10 东莞理工学院 Hierarchical routing method based on service quality in wireless multi-hop network
CN108156616A (en) * 2016-12-06 2018-06-12 财团法人工业技术研究院 communication path management method and communication path management system
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CN101286780B (en) * 2007-04-12 2012-10-03 华为技术有限公司 System and method for implementing relay transmission
CN101291530B (en) * 2007-04-18 2012-07-11 株式会社日立制作所 Handoff method between different systems and wireless terminal
CN101785358A (en) * 2007-08-17 2010-07-21 高通股份有限公司 Heterogeneous wireless ad hoc network
US9398453B2 (en) 2007-08-17 2016-07-19 Qualcomm Incorporated Ad hoc service provider's ability to provide service for a wireless network
US8644206B2 (en) 2007-08-17 2014-02-04 Qualcomm Incorporated Ad hoc service provider configuration for broadcasting service information
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US9392445B2 (en) 2007-08-17 2016-07-12 Qualcomm Incorporated Handoff at an ad-hoc mobile service provider
US9167426B2 (en) 2007-08-17 2015-10-20 Qualcomm Incorporated Ad hoc service provider's ability to provide service for a wireless network
US9179367B2 (en) 2009-05-26 2015-11-03 Qualcomm Incorporated Maximizing service provider utility in a heterogeneous wireless ad-hoc network
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CN106658635A (en) * 2016-11-03 2017-05-10 东莞理工学院 Hierarchical routing method based on service quality in wireless multi-hop network
CN106658635B (en) * 2016-11-03 2019-08-09 东莞理工学院 The method of quality-of-service based hierarchy routing in wireless multi-hop network
CN108156616A (en) * 2016-12-06 2018-06-12 财团法人工业技术研究院 communication path management method and communication path management system
CN110519768A (en) * 2019-08-06 2019-11-29 中国联合网络通信集团有限公司 The method and apparatus that self-organizing network is established

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